Final answer:
Jan Zelezny's world record of nearly 325 feet is in the field event known as the javelin throw.
Step-by-step explanation:
Jan Zelezny holds the world record in the javelin throw with a throw of almost 325 feet. The field event being referred to here is the javelin throw. In the sport of athletics, specifically in the field events category, each event has its unique world records and notable athletes known for their exceptional performances, such as Jan Zelezny's record in javelin, Mike Powell's in long jump, Michael Carter's in shot put, and Udo Beyer's previous shot put record. These feats require a combination of technical skill, physical power, and the physics principles of projectile motion.